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    • 7. 发明公开
    • Process for producing 4-substituted-2-butenals
    • Verfahren zum Herstellen von 4-substitutionierten-2-Butenalen
    • EP0803493A2
    • 1997-10-29
    • EP97106817.6
    • 1997-04-24
    • KURARAY CO., LTD.
    • Iwasaki, HideharuOnishi, Takashi
    • C07C67/293C07C69/007C07C69/145C07C47/24C07C47/195C07C45/72
    • C07C45/74C07C67/293C07C47/24C07C69/007C07C69/145
    • Described is a process for producing a 4-substituted-2-butenal represented by the following formula (1);
      (wherein X represents an acyloxy group or halogen atom; R represents hydrogen atom, an aliphatic hydrocarbon group or an aromatic hydrocarbon group; and these hydrocarbon groups can be substituted with hydroxyl group, an alkoxy group, an aryloxy group, an acyl group or an alkoxycarbonyl group),
      which is useful as synthetic intermediate of pharmaceuticals, agricultural chemicals and the like,
      comprising subjecting a substituted acetaldehyde represented by the following formula (2);

              X-CH 2 -CHO     (2)

      (wherein X has the same meaning as defined above),to the reaction with an aldehyde represented by the following formula (3);

              R-CH 2 -CHO     (3)

      (wherein R has the same meaning as defined above)
      in the presence of an amino carboxylic acid.
    • 描述了由下式(1)表示的4-取代-2-丁烯醛的制备方法。 (其中X表示酰氧基或卤素原子; R表示氢原子,脂族烃基或芳香族烃基;这些烃基可以被羟基,烷氧基,芳氧基,酰基 基团或烷氧基羰基),其可用作药物,农药等的合成中间体,包括使由下式(2)表示的取代乙醛进行处理; 与下式(3)表示的醛反应的X-CH 2 -CH(其中X具有与上述相同的含义)。 在氨基羧酸存在下,R-CH2-CHO(其中R具有与上述相同的含义)。